Question about 1999 Chevrolet S-10 Pickup

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Stuck in 4x4

Hi I have a 99 sonoma, Shifted it in 4x4 and it won't disengage,I bought a new servo still the same thing, if I take the servo off i can manually shift it into 4x4 or 2x4 but as soon as the motor is put back on it automatically shifts to 4x4 again,is this common ? would it hurt anything to gear it up manually like the past s-10?

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  • sheldonwm May 16, 2009

    replaced the switch, thanks though



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Sounds like a bad switch.

Posted on May 16, 2009

  • Clint Smock
    Clint Smock May 17, 2009

    Sorry you didn't tell me that, I'll look up the diagram and see if I can figure it out. When it shifts to 4 wheel drive what do the lights on the switch say it's in. Are they right or wrong. Also I'm kind of confused on your first post. Did you replace the transfer case shift motor or the front axle vacuum actuator? OR Both? What all did you replace?

  • Clint Smock
    Clint Smock Jun 01, 2009

    Thanks for the great rating. At least you could answer my questions.


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I have the same problem with my 99 GMC sierra. Went into 4X4 and will not come out. You can hear the shift motor running when you push the buttons, but does not shift out. Note, I did not put it into 4X4 it went there by it self.

Posted on Jul 25, 2009


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